Trending questions in Big Data Hadoop

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Hadoop vs Data Lake

A data lake is a storage repository that holds ...READ MORE

Mar 26, 2018 in Big Data Hadoop by Ashish
 • 2,650 points • 1,933 views
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How to migrate/ change Hadoop 1.x maven project to Hadoop 2.x?

In Hadoop 2.2. most of the dependencies ...READ MORE

Apr 15, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 1,053 views
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How Hadoop replication works?

dfs.replication is by default 3 and you ...READ MORE

Apr 19, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 869 views
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Hadoop: TaskTracker and JobTracker don't start with start-dfs.sh

You must run the start-dfs..sh too. So when ...READ MORE

Apr 4, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 1,536 views
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How to use custom FileInputFormat in MapReduce?

You have to override isSplitable method. ...READ MORE

Apr 10, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 1,217 views
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Cassandra and Hadoop - realtime vs batch

Apache Hadoop, is a big data analytics ...READ MORE

Mar 26, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 1,792 views
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Is there any way to write "map only" Hadoop jobs ?

You can easily set the number of ...READ MORE

Apr 16, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 912 views
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When was the first version of Hadoop released?

September 4, 2007 READ MORE

Apr 20, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 732 views
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Access DFS through Java API

It is because, may be you are ...READ MORE

Mar 23, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 1,927 views
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Why Hadoop is tightly bound to linux?

As far as I can tell, using ...READ MORE

Apr 19, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 708 views
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Can one implement combiner and reducer separately?

Surely, you can use combiner separately along ...READ MORE

Apr 10, 2018 in Big Data Hadoop by Ashish
 • 2,650 points • 1,092 views
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Declaring separator in the MapReduce(Hadoop 0.20)

In the new API you have to ...READ MORE

Apr 20, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 601 views
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Getting error in Custom Input Format

Use this property directly to delimit the ...READ MORE

Apr 19, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 628 views
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Files for Configuring HDFS in Hadoop 2.2.0?

By default these Hadoop configuration files are ...READ MORE

Apr 15, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 759 views
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Is there a way to rebalance single Datanode in Hadoop.

Currently Hadoop does not automatically do this. ...READ MORE

Apr 15, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 752 views
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Examples of real world big data open source applications

If you are looking for big data ...READ MORE

Apr 4, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 1,213 views
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When hadoop-env.sh will be executed in hadoop

Yes you need to put in the ...READ MORE

Apr 3, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 1,247 views
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1 answer

Apache Hadoop Yarn example program

You can go to this location $Yarn_Home/share/hadoop/mapreduce . You'll ...READ MORE

Apr 4, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 1,197 views
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How to sync Hadoop configuration files to multiple nodes?

For syncing Hadoop configuration files, you have ...READ MORE

Jun 21, 2018 in Big Data Hadoop by HackTheCode
 • 1,353 views
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1 answer

What is a importance of Hive ODBC Connector

The Cloudera ODBC Driver for Hive enables ...READ MORE

Apr 10, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 860 views
0 votes
1 answer

How to set a custom install directory for a deb package with fpm

Here's something that you can try... the last ...READ MORE

Mar 26, 2018 in Big Data Hadoop by Amrinder
 • 140 points • 1,521 views
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Is it possible to only install Hadoop HDFS?

First of all think of Hadoop as ...READ MORE

Mar 27, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 1,398 views
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Is Hadoop a good open-source project to join?

Yes, Hadoop has a whole ecosystem of ...READ MORE

Apr 12, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 738 views
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1 answer

What do we exactly mean by “Hadoop” – the definition of Hadoop?

The official definition of Apache Hadoop given ...READ MORE

Mar 16, 2018 in Big Data Hadoop by Shubham
 • 1,878 views
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Is java necessary for Hadoop?

It is not a prerequisite. But you ...READ MORE

Apr 11, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 725 views
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1 answer

Hadoop MapReduce vs MongoDB MapReduce

Hadoop vs MongoDB MR: 1) Hadoop's MR can ...READ MORE

Mar 26, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 1,413 views
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1 answer

How to integrate Hadoop with Elasticsearch?

The HDFS snapshot/restore plugin comes in three ...READ MORE

Mar 22, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 1,596 views
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1 answer

Unable to install RHadoop Packages?

I would recommend you to follow https://github.com/RevolutionAnalytics/rhadoop/wiki/Installing-RHadoop-on-RHEL ...READ MORE

Mar 22, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 1,604 views
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Deleting a directory with comma throwing an error

As comma is an escape sequence character, ...READ MORE

Apr 15, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 508 views
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RDBMS Vs Hadoop

There are various challenges with RDBMS such ...READ MORE

Apr 6, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 846 views
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How to install Hadoop on Ubuntu?

You can refer to this blog by ...READ MORE

Mar 21, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 1,495 views
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which one to choose for log analysis?

It is not about that you can ...READ MORE

Apr 6, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 719 views
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1 answer

Hadoop on Windows - Training

If your primary objective is to learn ...READ MORE

Mar 27, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 1,125 views
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How does the HDFS Client knows the block size while writing?

HDFS is designed in a way where ...READ MORE

Mar 27, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 1,103 views
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How to start working on Hadoop?

Ok, so basically, you are looking forward ...READ MORE

Mar 30, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 964 views
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How can I download only hdfs and not hadoop?

No, you cannot download HDFS alone because ...READ MORE

Mar 16, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 1,543 views
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1 answer

What is ClickStream Data Analysis

On a Web site, clickstream analysis (also ...READ MORE

Mar 22, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 1,256 views
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Avro - Getting Started

Refer to the example given here. It's ...READ MORE

Apr 4, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 648 views
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Will hadoop replace data warehousing?

Mostly the answer is yes hadoop is ...READ MORE

Apr 4, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 646 views
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How to learn Big Data and Ecosystem ?

First understand Big Data and challenges associated ...READ MORE

Mar 27, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 960 views
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1 answer

How can I get the respective Bitcoin value for an input in USD when using c#

Simply make call to server and parse ...READ MORE

Mar 25, 2018 in Big Data Hadoop by charlie_brown
 • 7,720 points • 1,049 views
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What is Hadoop Distribution ?

Some companies release or sell products that ...READ MORE

Mar 27, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 948 views
+1 vote
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Is Hadoop only Framework in Big Data Ecosystem ?

Actually there are many other frameworks, one of ...READ MORE

Mar 26, 2018 in Big Data Hadoop by Ashish
 • 2,650 points • 938 views
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Other Distributed Alternatives to Big Data Hadoop

Yes, there are lot of alternatives to ...READ MORE

Mar 27, 2018 in Big Data Hadoop by coldcode
 • 2,090 points • 892 views
+1 vote
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Is it necessary to use Zookeeper in Hadoop Stack?

ZooKeeper is a centralized service for maintaining ...READ MORE

Mar 27, 2018 in Big Data Hadoop by Ashish
 • 2,650 points • 832 views
0 votes
1 answer

How to run example codes of Hadoop Definitive Guide book?

You will find multiple git repositories where ...READ MORE

Mar 21, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 1,109 views
0 votes
1 answer

Testing methods used by a Hadoop developer ?

As such, there is no exact way ...READ MORE

Mar 26, 2018 in Big Data Hadoop by Ashish
 • 2,650 points • 885 views
+1 vote
1 answer

HDFS Permission

You have to check permissions on the ...READ MORE

Mar 26, 2018 in Big Data Hadoop by Ashish
 • 2,650 points • 827 views
0 votes
1 answer

How to get started with Hadoop?

Well, hadoop is actually a framework that ...READ MORE

Mar 21, 2018 in Big Data Hadoop by coldcode
 • 2,090 points • 1,178 views
0 votes
1 answer

Is there a good online tutorial for Hadoop development on a Windows 7 machine?

I would suggest you go through this ...READ MORE

Mar 29, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 692 views
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